>yuva ( color -- yuva )
YUV colors

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<yuva> ( y u v alpha -- yuva )

Vocabulary
colors.yuv

Inputs

color

an object

Outputs

yuva

an object

Definition

IN: colors.yuv

GENERIC: >yuva ( color -- yuva )

Methods

USING: colors colors.yuv kernel ;

M: object >yuva >rgba >yuva ;


USING: colors colors.yuv colors.yuv.private math ;

M:: rgba >yuva ( rgba -- yuva )
    rgba >rgba-components :> ( r g b a ) Wr r * Wg g * Wb b * +
    + :> y Umax 1 Wb - / b y - * :> u Vmax 1 Wr - / r y - *
    :> v y u v a <yuva> ;


USING: colors.yuv ;

M: yuva >yuva ; inline